Justification of the Photoplethysmography Sensor Configuration by Monte Carlo Modeling of the Pulse Waveform

Photoplethysmography (PPG) is an optical technique for detection of blood volume changes in the microvascular bed a biological tissue. Many aspects PPG signal formation are still unclear. In particular, it not known how shape registered depends on geometry tissue illumination. The aim this study to model waveform using Monte Carlo (MC) method. For this, we developed three-layer skin reflectance and verified experimentally different wavelengths (660, 810, 940 nm) source-detector distances (from 4 10 mm). MC simulation results showed that distance. most pronounced diastolic wave observed at distance 6 mm wavelength 810 nm. obtained can be used development sensors.